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| import os | |
| os.system('pip install dashscope') | |
| import gradio as gr | |
| from http import HTTPStatus | |
| import dashscope | |
| from dashscope import Generation | |
| from dashscope.api_entities.dashscope_response import Role | |
| from typing import List, Optional, Tuple, Dict | |
| from urllib.error import HTTPError | |
| default_system = 'You are a helpful assistant.' | |
| YOUR_API_TOKEN = os.getenv('YOUR_API_TOKEN') | |
| dashscope.api_key = YOUR_API_TOKEN | |
| History = List[Tuple[str, str]] | |
| Messages = List[Dict[str, str]] | |
| def clear_session() -> History: | |
| return '', [] | |
| def modify_system_session(system: str) -> str: | |
| if system is None or len(system) == 0: | |
| system = default_system | |
| return system, system, [] | |
| def history_to_messages(history: History, system: str) -> Messages: | |
| messages = [{'role': Role.SYSTEM, 'content': system}] | |
| for h in history: | |
| messages.append({'role': Role.USER, 'content': h[0]}) | |
| messages.append({'role': Role.ASSISTANT, 'content': h[1]}) | |
| return messages | |
| def messages_to_history(messages: Messages) -> Tuple[str, History]: | |
| assert messages[0]['role'] == Role.SYSTEM | |
| system = messages[0]['content'] | |
| history = [] | |
| for q, r in zip(messages[1::2], messages[2::2]): | |
| history.append([q['content'], r['content']]) | |
| return system, history | |
| def model_chat(query: Optional[str], history: Optional[History], system: str | |
| ) -> Tuple[str, str, History]: | |
| if query is None: | |
| query = '' | |
| if history is None: | |
| history = [] | |
| messages = history_to_messages(history, system) | |
| messages.append({'role': Role.USER, 'content': query}) | |
| gen = Generation.call( | |
| model='qwen2-0.5b-instruct', | |
| messages=messages, | |
| result_format='message', | |
| stream=True | |
| ) | |
| for response in gen: | |
| if response.status_code == HTTPStatus.OK: | |
| role = response.output.choices[0].message.role | |
| response = response.output.choices[0].message.content | |
| system, history = messages_to_history(messages + [{'role': role, 'content': response}]) | |
| yield '', history, system | |
| else: | |
| raise ValueError('Request id: %s, Status code: %s, error code: %s, error message: %s' % ( | |
| response.request_id, response.status_code, | |
| response.code, response.message | |
| )) | |
| with gr.Blocks() as demo: | |
| gr.Markdown("""<center><font size=8>Qwen2-0.5b-instruct👾</center>""") | |
| with gr.Row(): | |
| with gr.Column(scale=3): | |
| system_input = gr.Textbox(value=default_system, lines=1, label='System') | |
| with gr.Column(scale=1): | |
| modify_system = gr.Button("🛠️ Set system prompt and clear history", scale=2) | |
| system_state = gr.Textbox(value=default_system, visible=False) | |
| chatbot = gr.Chatbot(label='qwen2-0.5b-instruct') | |
| textbox = gr.Textbox(lines=1, label='Input') | |
| with gr.Row(): | |
| clear_history = gr.Button("🧹 Clear history") | |
| sumbit = gr.Button("🚀 Send") | |
| textbox.submit(model_chat, | |
| inputs=[textbox, chatbot, system_state], | |
| outputs=[textbox, chatbot, system_input]) | |
| sumbit.click(model_chat, | |
| inputs=[textbox, chatbot, system_state], | |
| outputs=[textbox, chatbot, system_input], | |
| concurrency_limit = 5) | |
| clear_history.click(fn=clear_session, | |
| inputs=[], | |
| outputs=[textbox, chatbot]) | |
| modify_system.click(fn=modify_system_session, | |
| inputs=[system_input], | |
| outputs=[system_state, system_input, chatbot]) | |
| demo.queue(api_open=False) | |
| demo.launch(max_threads=5) | |